mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
ab14de6c37
Hopefully this will make it more maintainable and less error prone. Code makes use of search_exception_tables(). Since it calls this function before the kernel exeception table is sorted, there is an early call to sort_main_extable(). This way it's easy to use the already present infrastructure of fixup sections. Also this would allows to easily convert the rest of head[31|64].S into C code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
151 lines
2.9 KiB
ArmAsm
151 lines
2.9 KiB
ArmAsm
/*
|
|
* arch/s390/kernel/base.S
|
|
*
|
|
* Copyright IBM Corp. 2006,2007
|
|
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
|
|
* Michael Holzheu <holzheu@de.ibm.com>
|
|
*/
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/lowcore.h>
|
|
|
|
#ifdef CONFIG_64BIT
|
|
|
|
.globl s390_base_mcck_handler
|
|
s390_base_mcck_handler:
|
|
basr %r13,0
|
|
0: lg %r15,__LC_PANIC_STACK # load panic stack
|
|
aghi %r15,-STACK_FRAME_OVERHEAD
|
|
larl %r1,s390_base_mcck_handler_fn
|
|
lg %r1,0(%r1)
|
|
ltgr %r1,%r1
|
|
jz 1f
|
|
basr %r14,%r1
|
|
1: la %r1,4095
|
|
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
|
|
lpswe __LC_MCK_OLD_PSW
|
|
|
|
.section .bss
|
|
.globl s390_base_mcck_handler_fn
|
|
s390_base_mcck_handler_fn:
|
|
.quad 0
|
|
.previous
|
|
|
|
.globl s390_base_ext_handler
|
|
s390_base_ext_handler:
|
|
stmg %r0,%r15,__LC_SAVE_AREA
|
|
basr %r13,0
|
|
0: aghi %r15,-STACK_FRAME_OVERHEAD
|
|
larl %r1,s390_base_ext_handler_fn
|
|
lg %r1,0(%r1)
|
|
ltgr %r1,%r1
|
|
jz 1f
|
|
basr %r14,%r1
|
|
1: lmg %r0,%r15,__LC_SAVE_AREA
|
|
ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
|
|
lpswe __LC_EXT_OLD_PSW
|
|
|
|
.section .bss
|
|
.globl s390_base_ext_handler_fn
|
|
s390_base_ext_handler_fn:
|
|
.quad 0
|
|
.previous
|
|
|
|
.globl s390_base_pgm_handler
|
|
s390_base_pgm_handler:
|
|
stmg %r0,%r15,__LC_SAVE_AREA
|
|
basr %r13,0
|
|
0: aghi %r15,-STACK_FRAME_OVERHEAD
|
|
larl %r1,s390_base_pgm_handler_fn
|
|
lg %r1,0(%r1)
|
|
ltgr %r1,%r1
|
|
jz 1f
|
|
basr %r14,%r1
|
|
lmg %r0,%r15,__LC_SAVE_AREA
|
|
lpswe __LC_PGM_OLD_PSW
|
|
1: lpswe disabled_wait_psw-0b(%r13)
|
|
|
|
.align 8
|
|
disabled_wait_psw:
|
|
.quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler
|
|
|
|
.section .bss
|
|
.globl s390_base_pgm_handler_fn
|
|
s390_base_pgm_handler_fn:
|
|
.quad 0
|
|
.previous
|
|
|
|
#else /* CONFIG_64BIT */
|
|
|
|
.globl s390_base_mcck_handler
|
|
s390_base_mcck_handler:
|
|
basr %r13,0
|
|
0: l %r15,__LC_PANIC_STACK # load panic stack
|
|
ahi %r15,-STACK_FRAME_OVERHEAD
|
|
l %r1,2f-0b(%r13)
|
|
l %r1,0(%r1)
|
|
ltr %r1,%r1
|
|
jz 1f
|
|
basr %r14,%r1
|
|
1: lm %r0,%r15,__LC_GPREGS_SAVE_AREA
|
|
lpsw __LC_MCK_OLD_PSW
|
|
|
|
2: .long s390_base_mcck_handler_fn
|
|
|
|
.section .bss
|
|
.globl s390_base_mcck_handler_fn
|
|
s390_base_mcck_handler_fn:
|
|
.long 0
|
|
.previous
|
|
|
|
.globl s390_base_ext_handler
|
|
s390_base_ext_handler:
|
|
stm %r0,%r15,__LC_SAVE_AREA
|
|
basr %r13,0
|
|
0: ahi %r15,-STACK_FRAME_OVERHEAD
|
|
l %r1,2f-0b(%r13)
|
|
l %r1,0(%r1)
|
|
ltr %r1,%r1
|
|
jz 1f
|
|
basr %r14,%r1
|
|
1: lm %r0,%r15,__LC_SAVE_AREA
|
|
ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
|
|
lpsw __LC_EXT_OLD_PSW
|
|
|
|
2: .long s390_base_ext_handler_fn
|
|
|
|
.section .bss
|
|
.globl s390_base_ext_handler_fn
|
|
s390_base_ext_handler_fn:
|
|
.long 0
|
|
.previous
|
|
|
|
.globl s390_base_pgm_handler
|
|
s390_base_pgm_handler:
|
|
stm %r0,%r15,__LC_SAVE_AREA
|
|
basr %r13,0
|
|
0: ahi %r15,-STACK_FRAME_OVERHEAD
|
|
l %r1,2f-0b(%r13)
|
|
l %r1,0(%r1)
|
|
ltr %r1,%r1
|
|
jz 1f
|
|
basr %r14,%r1
|
|
lm %r0,%r15,__LC_SAVE_AREA
|
|
lpsw __LC_PGM_OLD_PSW
|
|
|
|
1: lpsw disabled_wait_psw-0b(%r13)
|
|
|
|
2: .long s390_base_pgm_handler_fn
|
|
|
|
disabled_wait_psw:
|
|
.align 8
|
|
.long 0x000a0000,0x00000000 + s390_base_pgm_handler
|
|
|
|
.section .bss
|
|
.globl s390_base_pgm_handler_fn
|
|
s390_base_pgm_handler_fn:
|
|
.long 0
|
|
.previous
|
|
|
|
#endif /* CONFIG_64BIT */
|